HDPE
ʻO ka polyethylene kiʻekiʻe (HDPE) a i ʻole polyethylene kiʻekiʻe (PEHD) kahi thermoplastic polyethylene i hana ʻia mai ka ʻailaila. Kāhea ʻia ia i kekahi manawa ʻo "alkathene" a i ʻole "polythene" ke hoʻohana ʻia no nā paipu. Me ka lakio kiʻekiʻena kiʻekiʻe-to-density, hoʻohana ʻia ʻo HDPE i ka hana ʻana o nā hue ea, ka paipu kūpale ʻaʻai, nā geomembranes, a me nā lāʻau lika. Hoʻohana hou ʻia ʻo HDPE, a loaʻa iā ia ka helu "2" ma ke ʻano he code resin identification (ma mua i kapa ʻia he hōʻailona hoʻopōʻaiapuni).
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PET
ʻO Polyethylene terephthalate (i nā manawa kākau (polyylene terephthalate i kākau ʻia)), maʻamau i hōʻoki ʻia ʻo PET, PETE, a i ʻole PETP ka mea maʻamau, ʻo ia ka thermoplastic polymer resin o ka ʻohana polyester a hoʻohana ʻia i loko o nā fibers no ka lole, nā ipu no ka wai. nā meaʻai, thermoforming no ka hana ʻana, a e hui pū me ka mīkini aniani no nā ʻenehana loea.
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petg
Ma kahi o ka maʻi (homopolymer) PET, PET i hoʻololi ʻia e ka copolymerization i loaʻa pū kekahi.
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PP
ʻO Polypropylene (PP), ka mea i ʻike ʻia e ka polypropene, he polimepo thermoplastic i hoʻohana ʻia i nā pālahalaha nui e like me ke kāpili a me ka kāpili ʻana, nā ʻāpana (nā huaʻi, nā kaula hao wai, nā kākā wai me nā kākela), ka poʻomanaʻo, nā ʻāpana a me nā ʻāpana ʻē aʻe o nā ʻano like ʻole, ʻenehana nā mea hana, nā leo uila, nā ʻenehana automotive, a me nā poleta polimer. ʻO kahi polymer i hana ʻia mai ka monomer propylene, ua ʻāhewa ʻia a i ʻole kūlohelohe ʻia i nā solvents kemika, nā waihona a me nā waʻa.
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